Date: Saturday, April 20, 2002
How do I tell the sex of my frog or toad?
It depends on the species. Males of many species have enlarged thumb or
forefinger, some have enlarged pads on those limbs, or harder spots, used
for grasping the female during mating. Other species have differences in the
throat sac. There is a slight difference in the side of the head of bull
frogs. The Handbook of Frogs and Toads, by Wright and Wright, has an
excellent page of photographs, if you can find the book.
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Update: June 2012